Hybrid display device, manufacturing method of hybrid display device, and display terminal

Abstract

The present disclosure provides a hybrid display device. The hybrid display device includes: a driving backplane defined with an undercut groove; and a light-emitting structure layer including a first electrode layer, a common cathode, light-emitting elements, and first light-emitting units; the first electrode layer is electrically connected to a driving circuit layer; the first electrode layer includes first anodes, auxiliary cathodes, and second anodes, the undercut groove is adjacent to the first anodes, the common cathode is disconnected at the undercut groove, and a gap is defined between the common cathode and the first anodes.

What is claimed is: 
     
         1 . A hybrid display device, comprising:
 a driving backplane comprising a driving circuit layer, a first passivation protection layer, and a pressure-resistant layer stacked in sequence; wherein the driving backplane is defined with at least one undercut groove, and the undercut groove penetrates the first passivation protection layer and the pressure-resistant layer; and   a light-emitting structure layer comprising an electrode layer, a common cathode, a plurality of light-emitting elements, and a plurality of first light-emitting units; wherein the electrode layer is formed on the pressure-resistant layer and is electrically connected to the driving circuit layer, the light-emitting elements and the first light-emitting units are all formed on the electrode layer, and the common cathode is formed on the first light-emitting units;   wherein the electrode layer comprises a plurality of first anodes, a plurality of auxiliary cathodes, and a plurality of second anodes, and the light-emitting elements are bond to the driving backplane through the first anodes and the auxiliary cathodes; the first light-emitting units are formed between the second anodes and the common cathode; the undercut groove is adjacent to the first anodes, the common cathode is disconnected at the undercut groove, and a gap is defined between the common cathode and the first anodes.   
     
     
         2 . The hybrid display device as claimed in  claim 1 , wherein the driving circuit layer comprises a plurality of first driving transistors, the first driving transistors comprise first sources and first drains; the undercut groove comprises a first groove and a second groove, the first groove penetrates the pressure-resistant layer, and the second groove penetrates the first passivation protection layer; the first groove is arranged opposite to the second groove, and a size of an opening of the first groove adjacent to the second groove is less than a size of an opening of the second groove adjacent to the first groove; and
 a part of the first drain is exposed from the second groove, and one of the first anodes is electrically connected to the first drain.   
     
     
         3 . The hybrid display device as claimed in  claim 2 , wherein each of the first driving transistors further comprises signal input terminal, the signal input terminal, the first source, and the first drain are arranged on a same layer, and the auxiliary cathode is electrically connected to the signal input terminal. 
     
     
         4 . The hybrid display device as claimed in  claim 1 , wherein the auxiliary cathodes are electrically connected to the common cathode. 
     
     
         5 . The hybrid display device as claimed in  claim 2 , wherein a thickness of the pressure-resistant layer corresponding to the first driving transistors is less than a thickness of the pressure-resistant layer corresponding to the first anodes. 
     
     
         6 . The hybrid display device as claimed in  claim 5 , wherein the driving backplane further comprises a light-shielding layer, the light-shielding layer is arranged on the pressure-resistant layer and is opposite to the first driving transistors; a surface of the light-shielding layer away from the first driving transistors and surfaces of the first anodes away from the pressure-resistant layer are on a same horizontal plane. 
     
     
         7 . The hybrid display device as claimed in  claim 2 , wherein the driving backplane further comprises a plurality of second driving transistors and a plurality of third driving transistors; the electrode layer further comprises a plurality of third anodes;
 the second anodes are arranged corresponding to the second driving transistors, and electrically connected to the second driving transistor; and   the light-emitting structure layer further comprises a plurality of second light-emitting units, each of the second light-emitting units is formed between the third anodes and the common cathode, and the third anodes are electrically connected to the third driving transistors.   
     
     
         8 . The hybrid display device as claimed in  claim 7 , wherein a thickness of the pressure-resistant layer corresponding to the second driving transistors and the third driving transistors is less than a thickness of the pressure-resistant layer corresponding to the first anodes. 
     
     
         9 . The hybrid display device as claimed in  claim 7 , wherein the light-emitting elements are light-emitting diode elements emitting blue light, the first light-emitting units are organic light-emitting units or quantum dot light-emitting units emitting green light, and the second light-emitting units are organic light-emitting units or quantum dot light-emitting units emitting red light. 
     
     
         10 . The hybrid display device as claimed in  claim 7 , wherein the light-emitting structure layer further comprises a plurality of first blocking wall, a plurality of second blocking wall, and a plurality of third blocking wall formed on the pressure-resistant layer, and the common cathode covers the first blocking wall, the second blocking wall, and the third blocking wall;
 the first blocking wall is arranged between the auxiliary cathodes and the second anodes;   the second blocking wall is arranged between the second anodes and the third anodes, and the third blocking wall is arranged on an outer side of the third anodes;
 a first pixel opening is defined between the first blocking wall and the second blocking wall, and a second pixel opening is defined between the second blocking wall and the third blocking wall; and 
 the first light-emitting units are disposed in the first pixel opening, and the second light-emitting units are disposed in the second pixel opening. 
   
     
     
         11 . The hybrid display device as claimed in  claim 1 , wherein in a same etching solution, an etching resistance of the pressure-resistant layer is better than an etching resistance of the first passivation protection layer. 
     
     
         12 . A display terminal, wherein the display terminal comprises a body portion and a hybrid display device formed on the body portion, and the hybrid display device comprises:
 a driving backplane comprising a driving circuit layer, a first passivation protection layer, and a pressure-resistant layer stacked in sequence; wherein the driving backplane is defined with at least one undercut groove, and the undercut groove penetrates the first passivation protection layer and the pressure-resistant layer; and   a light-emitting structure layer comprising an electrode layer, a common cathode, a plurality of light-emitting elements, and a plurality of first light-emitting units; wherein the electrode layer is formed on the pressure-resistant layer and is electrically connected to the driving circuit layer, the light-emitting elements and the first light-emitting units are all formed on the electrode layer, and the common cathode is formed on the first light- emitting unit;   wherein the electrode layer comprises a plurality of first anodes, a plurality of auxiliary cathodes, and a plurality of second anodes, and the light-emitting elements are bond to the driving backplane through the first anodes and the auxiliary cathodes; the first light-emitting units are formed between the second anodes and the common cathodes; the undercut groove is adjacent to the first anodes, the common cathode is disconnected at the undercut groove, and a gap is provided between the common cathode and the first anodes.   
     
     
         13 . The display terminal as claimed in  claim 12 , wherein the driving circuit layer comprises a plurality of first driving transistors, each of the first driving transistors comprises a first source and a first drain; the undercut groove comprises a first groove and a second groove, the first groove penetrates the pressure-resistant layer, and the second groove penetrates the first passivation protection layer; the first groove is arranged opposite to the second groove, and a size of an opening of the first groove adjacent to the second groove is less than a size of an opening of the second groove adjacent to the first groove;
 a part of the first drain is exposed from the second groove, and one of the first anodes is electrically connected to the first drain.   
     
     
         14 . The display terminal as claimed in  claim 13 , wherein each of the first driving transistors further comprises a signal input terminal arranged in a same layer as the first source and the first drain, and one of the auxiliary cathodes is electrically connected to the signal input terminal. 
     
     
         15 . The display terminal as claimed in  claim 12 , wherein the auxiliary cathode is electrically connected to the common cathode. 
     
     
         16 . The display terminal as claimed in  claim 13 , wherein a thickness of the pressure-resistant layer corresponding to the first driving transistors is less than a thickness of the pressure-resistant layer corresponding to the first anodes. 
     
     
         17 . The display terminal as claimed in  claim 16 , wherein the driving backplane further comprises a light-shielding layer formed on the pressure-resistant layer and is opposite to the first driving transistors; a surface of the light-shielding layer away from the first driving transistors and surfaces of the first anodes away from the pressure-resistant layer are on a same horizontal plane.